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Synthesis of zinc sulfide semiconductor nanoparticles by coprecipitation method for biological diagnostics

B. BAHMANI1,* , MOZTARZADEH1, M. RABIEE1

Affiliation

  1. Biomedical Faculty of Amirkabir University of Technology, 424, Hafez Ave., Tehran, Iran

Abstract

Zinc Sulfide nanoparticles of the cubic zinc blende structure with the average crystallite size of about 3-5 nm were synthesized using a coprecipitation method and were stabilized with Sodium Tripolyphosphate. Then the room-temperature photoluminescence (PL) of zinc sulfide (ZnS) nanoparticles were investigated. Surface modification was carried out by linking Thioglycolic acid to the nanoparticles' surface in order to enable linking nanoparticles up with biological components such as Biotin. Luminescence spectra observations of nanoparticles illustrated a blue emission band in the range of 370-430 nm as a result of Copper dopant. Further more, Spectroscopy analysis of resulted complex proved that the emission intensity of nanoparticles decreases due to the increasing of Biotin amount. Therefore, the amount of biological material can easily be detected through measuring optical properties of these biological fluorescent markers..

Keywords

Semiconductor nanoparticles, Zinc Sulfide, Biological diagnostics, Biological markers, Coprecipitation method.

Submitted at: March 23, 2007
Accepted at: Nov. 16, 2007

Citation

B. BAHMANI, MOZTARZADEH, M. RABIEE, Synthesis of zinc sulfide semiconductor nanoparticles by coprecipitation method for biological diagnostics, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 11, pp. 3336-3339 (2007)